Gearing.



. G. E. SEYMOUR.

GBARING. APPLICATION FILED OVOT. 21, 1912.

Patent-.ea Aug. 18, 1914.

NTTED sTATEs PATENT oEEioE.

GEAEING.

rimasi. Q

To all whom 'it may concern Be it known that I, GEORGE EDGAR SEY- MOUR,a subject of the King of England, residing at Newcastle-upon-Tyne, inEngland, have invented certain new and useful Improvements in Gearing,of which the following is a specification.

This invention consists in improvements in and relating to toothed andWorm gear-` ing of that type in which the teeth are formed of metallicor other l'aminae, the invention residing in means for lubricating saidteeth, and in certain details of construction all as hereinafter 'fullydescribed and specitically pointed out in the appended claims referencebeing made to the accompanying drawings in which:

Figure 1 is a side elevation of a spur pinion constructed according tothis invention with exterior parts broken away. Fig. 2 is a sectionalelevation of the pinion shown in Fig. 1, and Fig. 3 a partial crosssection through a gear wheel.

The gear wheels shown in the drawings comprise a boss f (Figs. 1 and 2)or rim g (Fig. 3) with a central flange e integral with or fixed to f org having at its outer end` an annular projection extending laterally toeach side thereof. The teeth of the Wheel are formed of metallic lamina:l, shown exaggerated in thickness, held in place against. the centraltlangeby clamping rings a one at each side, and by bolts or rivets t)extending through said lamina, central flange, and the clamping rings,the latter heilig pro vided with interior annulaiprojections c. The saidrings are shown as'extending to the outer surface of the teeth, but theylinlay.

terminate at somedistance within said outer surface if desired. Thelaminee Z are kept well clear of the boss f or of the rim g so that anannular space 7c is formed between said boss or rim and the laminae,this space extending between the clamping rings, for the reception of' asuitable lubricantwhich is introduced through a hole in one or both ofthe clamping rings, said hole or holes being closed as by a screwed plugIn operation, the lubricant in said space 1, helped by centrifugalaction, makes its way between the laminae tothe working faces of theteeth. The annular projections ed on the clamping rings and on thecentral flange .e respectively are rounded to reduce any tendency toform a line of fracture in the laminae. As the bolts or rivets passthrough. the lamina:

Specification of Letters Patent.

Patented Aug. 18, 1914.

Application led October 21, 1912. Serial No. 726,941. i

and the central flange the .drive is through the bolts.

From experience I find that in an pinion or Wheel when working at its ful load the noise is scarcely observable, but with lighter loads on thesame pinion or wheel the noise is increased, and is loudest With noload. To overcome this Iinake one or more fine saw cuts m, produced by asaw or parting tool, extending for nearly the depth of the teeth allround the pinion or wheel across the teeth, these cuts being eitherparallel to the clamping rings as shown vor in the form of a helix. Bythese means the gearing when working is practically noiseless. vIn Fig.2 it designates a shaft passing through the boss f. The laminae arepreferably wedge-shaped, tapering toward the center of the gear andextending diagonally with respect to the axis of the gear.

What I claim as my invention and desire to secure by Letters Patent ofthe United States is l. A gear comprising an annular tooth supportingmember, and teeth formed of helicoidally disposed lamina-e spaced'outwardly from said member to form the outer"V wall of a chamber for thereception of lu bricant, the meeting faces of said laminas extendingfrom said chamber to the working face of said teeth whereby thelubricant is forced between said meeting faces to the working faces ofthe teeth by centrifugal action means for pressing said-laminasadjustably toward one another, and means for positively transferring thedrive between he laminac and the tooth supporting mem- 2. A. gearcomprising an annular tooth supporting member, helicoidally disposedmetallic laminas forming teeth spaced outwardly from said member to formthe outer wall of a chamber for the reception of lubricant, clampingelements mounted on said supporting member outside the laminae to formthe end walls of said chamber, said clamping elements having an openingpermitting introduction of the lubricant, aclosure for such opening` andadjustable tie members traversing said laminae and clamping elements.

3. A. gear comprising an annular tooth supporting member having acentral ianged web thereon, metallic laminae forming teeth spacedradially outward from said member to form the outer wall of a chamberfor the reception of lubricant, said central web dividing said chamberinto two separate chambers, clamping rings engaging the supportingmembers at opposite ends of the lamina@ and forming the outerend Wallsof said chambers, each of said rings having an opening for theintroduction of the lubricant into the chambers, a plug in each opening,and bolts traversing said laminae, central flange and clamping rings,and nuts for adjusting the clamping pressure of said bolts.-

4. A gear comprising. an annular tooth supporting member, and teethformed of helicoidally disposed laminae spaced out- Wardly from saidmember to form the outer Wall of a chamber for the reception oflubricant, the meeting faces of said laminae extending from said chamberto the Working face of said teeth whereby the lubricant is forcedbetween said meeting faces to the Working faces of the teeth bycentrifugal action, means for pressing said laminae adjustably towardone another, and

means for positively transferring the drive between the laminae and thetooth supporting member, said teeth being provided with saw cutstherethrough extending around the periphery of the gear.

5. A gear comprising a boss or rim, teeth formed of helicoidallydisposedv metallic laminas spaced outwardly from said boss or rim toafford a chamber for reception of lubricant, said teeth having saw cutsthereacross extending around the periphery of the ear, clamping elementsmounted on said lgnoss or rim outside the laminas, and having a closableorifice for introduction of lubricant to said chamber, and tiemembers'trav- .ersing said laminze and clamping members.

In Witness'whereof I have signed this specification 1n the presence oftwo Witnesses.

GEORGE EDGAR SEYMOUR. Witnesses:

H. M. H. NIXoN, C. S. GARDNER.

